Difference between revisions of "Cosmology"
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*What is the Lyman-alpha forest? | *What is the Lyman-alpha forest? | ||
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| + | The following was asked by MT | ||
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| + | * At what temperature did recombination happen? | ||
| + | * why is this temperature different from 10,000K for which ionization | ||
| + | happens in stars? | ||
| + | * go back in time, when is the next change in the "chemistry" of the | ||
| + | universe? | ||
| + | * how much helium is in the universe? | ||
Revision as of 21:47, 29 August 2007
Questions in this category have been asked by MT, PJ
- Describe the evolution of the Universe backwards in time from now to the beginning. Include the relative abundances of ALL particles (bosons & fermions) in the description.
- What is Omega_DarkMatter?
- Can it be neutrinos & how do we know?
- What is the flatness problem?
- How can you use inflation to explain it? (using Freedman eqs)
- What are other importances of inflation?
- What is CMB anisotropy?
- What is the value and the position of the first acoustic peak and its physics?
- What do you know about the CMB spectrum?
- Why do we need BBN to account for the abundance of He?
- Why can't BBN produce heavier elements but a star can?
- What do you know about dark energy?
- What is the Lyman-alpha forest?
The following was asked by MT
- At what temperature did recombination happen?
- why is this temperature different from 10,000K for which ionization
happens in stars?
- go back in time, when is the next change in the "chemistry" of the
universe?
- how much helium is in the universe?
